Hi, I have been working on a project that uses OAK-D-IoT-75 with raspberry pi. I am trying for some time now but I am unable to get it working with raspberry pi. I have used same oak with windows that works absolutely fine. I have checked your given solutions to the problem it suggested to add udev rules i did that exactly the way they suggested but it still does not not work. I have pasted photo of error for your reference. [URL=https://i.imgur.com/6gItFdZ.png][IMG]https://i.imgur.com/6gItFdZ.png[/IMG][/URL]

Hello @"msee19018"#p3589, see the [solution here](https://docs.luxonis.com/en/latest/pages/troubleshooting/#udev-rules-on-linux). You could also use a [pre-confnigured RPi image](https://docs.luxonis.com/projects/hardware/en/latest/pages/guides/raspberrypi.html) for the OAK cameras. Thanks, Erik

@"erik"#p3595 Thanks Erik. It started working with raspberry pi. I need to ask one more thing. I am running oak device with raspberry pi 4 and I want to make sure that it does not draw input power from raspberry pi as it would fry my RPi. How can i do that? I am connecting it with RPi using usb3 cable (C-type that i got with it) and I have also connected 15W 3A power adapter with the oak device. Does this make sure that it draws power from it's own adapter or i need to do anything else? I am concerned because if I connect device with my PC using C-type cable alone it starts running on PC's power and also when I run device with RPi it starts showing low voltage warning on screen which is not there if it is working alone.

Hello @"msee19018"#p3604 , Yes, when the external power supply is connected it will draw power from that. And I don't think the RPi would fry if you tried to power the OAK camera directly (from the RPi), I have tried it many times and in general, RPi can supply enough power to OAK but it sometimes brownouts (so restarts due to insufficient power). Thanks, Erik

@"erik"#p3614 Hi erik thanks for the answer. I am getting into another problem i have no idea why everything was working fine earlier. I was using oak-d-iot-75 with my laptop but yesterday i tried it with RPi it started working for some time but now it giving with this error even if i run simple camera preview code. Can guide why is that? I think problem is with usb modes. I am using the (C-type) cable which i got with oak-d device originally. [URL=https://i.imgur.com/nlPNT29.png][IMG]https://i.imgur.com/nlPNT29h.png[/IMG][/URL]

@"msee19018"#p3621 hi Erik, Thanks for your cooperation. I am running into another problem i have pasted the error below . can guide why is this happening? and is there a relationship between these two errors? [URL=https://i.imgur.com/7RgvvpJ.png][IMG]https://i.imgur.com/7RgvvpJ.png[/IMG][/URL]

@"msee19018"#p3621 How are you powering your OAK camera? Do you use an external power supply? It can happen that RPi can't supply enough power so the device crashes. Thanks, Erik

@"erik"#p3628 I am powering it with external adapter that i got with it. It works good with simple program like camera preview but when i run a complex program it does this. Btw it was working fine on this program earlier before i started using it with RPi. and now it does work even with my PC.

Hello @"msee19018"#p3630 , Could you share the pipeline, so we can debug it locally as well? Could you also try [forcing USB2 mode](https://docs.luxonis.com/en/latest/pages/troubleshooting/#forcing-usb2-communication)? Thanks, Erik

Hi Erik, I am getting this error on raspberry pi 4. It does not matter if i use usb2Mode or usb3Mode it gives same error. I have pasted the error below. Btw the code works okay with my PC and even with jetson nano as host but it does not work with RPi 4. I even installed ubuntu on RPi but that also gives same error. I have also pasted the code below. It is long code and has a couple of script nodes. Can you please suggest any solution. [URL=https://i.imgur.com/5iX2dAx.png][IMG]https://i.imgur.com/5iX2dAxh.png[/IMG][/URL] `import cv2 import depthai as dai import numpy as np import marshal import time import logging import os import requests g_time=0 cur_time='' cur_local='' cur_visit='' real_path = os.path.realpath(__file__) dir_path = os.path.dirname(real_path) LOGFILE = f"{dir_path}/test.log" logger = logging.getLogger('log_app') logger.setLevel(logging.DEBUG) fh = logging.FileHandler(LOGFILE) formatter = logging.Formatter('%(levelname)s - %(message)s') fh.setFormatter(formatter) logger.addHandler(fh) quarter_time_break=False prev_msb=0 sus_msb=0 msb_changed=False distinct_msbs=[] prev_digit_time=0 prev_time='' prev_local='' prev_visiting='' const_time_counter=0 game_status='unknown' game_period='unknown' clock_type='' sus_time='' sus_local='' sus_visiting='' local_changed=False visiting_changed=False seconds=False time_changed=False clock_condition=True seconds_counter=0 minutes_counter=0 frame_num=0 message_string='' whitelist=set('0123456789') time_bb_cord=[0.3734,0.6837,0.6437,0.8487] local_bb_cord=[0.3117,0.3775,0.4523,0.52625] visit_bb_cord=[0.5891,0.37,0.7367,0.5225] # Create pipeline def Manip_Frame(pipeline,region_bb_cord): manip_time = pipeline.create(dai.node.ImageManip) manip_time.initialConfig.setCropRect(region_bb_cord[0],region_bb_cord[1],region_bb_cord[2],region_bb_cord[3]) manip_time.setKeepAspectRatio(False) manip_time.initialConfig.setResize(100,32) return manip_time def NN_node(pipeline,path): nn = pipeline.create(dai.node.NeuralNetwork) nn.setBlobPath(path) return nn pipeline = dai.Pipeline() model_path = 'crnn_99_soft_no_norm_4.blob' cam = pipeline.create(dai.node.MonoCamera) cam.setBoardSocket(dai.CameraBoardSocket.RIGHT) cam.setFps(6) cam.setResolution(dai.MonoCameraProperties.SensorResolution.THE_800_P) manip_time=Manip_Frame(pipeline,time_bb_cord) cam.out.link(manip_time.inputImage) manip_local=Manip_Frame(pipeline,local_bb_cord) cam.out.link(manip_local.inputImage) manip_visit=Manip_Frame(pipeline,visit_bb_cord) cam.out.link(manip_visit.inputImage) script=pipeline.create(dai.node.Script) # script.inputs['time_frame'].setBlocking(False) # script.inputs['time_frame'].setQueueSize(1) # script.inputs['local_frame'].setBlocking(False) # script.inputs['local_frame'].setQueueSize(1) # script.inputs['visit_frame'].setBlocking(False) # script.inputs['visit_frame'].setQueueSize(1) manip_time.out.link(script.inputs['time_frame']) manip_local.out.link(script.inputs['local_frame']) manip_visit.out.link(script.inputs['visit_frame']) script.setScript(""" import marshal f_list={} while True: t_frame=node.io['time_frame'].get() l_frame=node.io['local_frame'].get() v_frame=node.io['visit_frame'].get() if t_frame is not None and 'time' not in f_list.keys(): t_f_num=t_frame.getSequenceNum() f_list['time']=t_f_num if l_frame is not None and 'local' not in f_list.keys(): l_f_num=t_frame.getSequenceNum() f_list['local']=l_f_num if v_frame is not None and 'visit' not in f_list.keys(): v_f_num=t_frame.getSequenceNum() f_list['visit']=v_f_num if len(f_list.keys())==3 and f_list['time']==f_list['local'] and f_list['time']==f_list['visit']: # x_serial=marshal.dumps(f_list) # b=Buffer(len(x_serial)) # b.setData(x_serial) f_list.clear() node.io['script_out'].send(t_frame) node.io['script_out1'].send(l_frame) node.io['script_out2'].send(v_frame) # node.warn(str(len(t_frame.getData()))) # node.warn(str(l_frame.getWidth())) # node.warn(str(v_frame.getWidth())) # node.warn('camera is okay') """) recog_nn=NN_node(pipeline,model_path) script.outputs['script_out'].link(recog_nn.input) script.outputs['script_out1'].link(recog_nn.input) script.outputs['script_out2'].link(recog_nn.input) decoder_script=pipeline.create(dai.node.Script) recog_nn.out.link(decoder_script.inputs['log_probs']) decoder_script.setScript(""" import marshal label2char={1: '0', 2: '1', 3: '2', 4: '3', 5: '4', 6: '5', 7: '6', 8: '7', 9: '8', 10: '9', 11: '.', 12: ':'} def get_strings(nndata): # num=nndata.getSequenceNum() outname=nndata.getAllLayerNames()[0] data=nndata.getLayerFp16(outname) raw_preds=[] for i in range(24): log_probs=data[i*13:i*13+13] raw_preds.append(log_probs.index(max(log_probs))) results=[] previous=None for l in raw_preds: if l != previous: results.append(l) previous = l results = [l for l in results if l != 0] # results = [label2char[l] for l in results] f_results='' for r in range(len(results)): f_results=f_results+label2char[results[r]] return f_results outs=[] while True: time_=node.io['log_probs'].get() # node.warn(time_.getSequenceNum()) # node.warn(str(len(time_.getData()))) results=get_strings(time_) # node.warn(str(len(results))) if len(results)==0: results='none' # print() if len(outs)==0: outs.append(results) elif len(outs)>0: if results=='none': outs.append(results) elif results!=outs[-1]: outs.append(results) if len(outs)==3: x_serial = marshal.dumps(outs) b = Buffer(len(x_serial)) b.setData(x_serial) outs.clear() node.io['f_time'].send(b) # node.warn('decoding is okay') """) nn_Out = pipeline.create(dai.node.XLinkOut) nn_Out.setStreamName("recogs1") decoder_script.outputs['f_time'].link(nn_Out.input) with dai.Device(pipeline) as device: nn_queue1 = device.getOutputQueue(name="recogs1", maxSize=4, blocking=False) i=0 j=0 while True: nn_out1 = nn_queue1.get() if nn_out1 is not None: score_dict=marshal.loads(nn_out1.getData()) # print(score_dict) if i3: result_time=score_dict[0] local=score_dict[1] visit=score_dict[2] elif len(score_dict[1])>3: result_time=score_dict[1] local=score_dict[2] visit=score_dict[0] elif len(score_dict[2])>3: result_time=score_dict[2] local=score_dict[0] visit=score_dict[1] if result_time=='none' or local =='none' or visit=='none': j=j+1 print('it is here') if j>30: message_string='Game is not active' print(message_string) fh.close() j=0 break continue if clock_condition: if len(result_time)==4: seconds_counter=seconds_counter+1 minutes_counter=0 continue elif len(result_time)==5: minutes_counter=minutes_counter+1 seconds_counter=0 if seconds_counter==3: seconds=True clock_condition=False elif minutes_counter==3: seconds=False clock_condition=False t_msb=int(result_time[0]) if len(distinct_msbs)==0: distinct_msbs.append(t_msb) if msb_changed: if t_msb==sus_msb: msb_changed=False if distinct_msbs[-1]==0 and t_msb==5: seconds=True distinct_msbs.append(t_msb) elif t_msb!=sus_msb: msb_changed=True sus_msb=t_msb else: if t_msb!=prev_msb: sus_msb=t_msb msb_changed=True if seconds: c_time=result_time[0]+result_time[1] else: c_time=result_time ds_time=''.join(filter(whitelist.__contains__,c_time)) local=''.join(filter(whitelist.__contains__,local)) visiting=''.join(filter(whitelist.__contains__,visit)) if len(ds_time)!=0 and len(local)!=0 and len(visiting)!= 0: # print(len(ds_time),len(local),len(visiting)) game_status='active' j=0 if time_changed: if c_time==sus_time: const_time_counter=0 time_changed=False # distinct_frames.append(ds_time) if game_status=='active' and game_period=='unknown': game_period='on_going' elif game_status=='active' and game_period=='stopped' and not quarter_time_break: game_period='on_going' g_time=time.time() print('Game is on_going') if seconds: message_string='Game started again! Time '+c_time+' Local Team Score = '+local+' Visitng Team Score = '+visiting g_time=time.time() print(message_string) logger.info(message_string) else: message_string='Game started again! Time '+c_time+' Local Team Score = '+local+' Visitng Team Score = '+visiting g_time=time.time() print(message_string) logger.info(message_string) elif c_time!=sus_time: time_changed=True sus_time=c_time const_time_counter=0 frame_num=frame_num+1 continue else: if c_time==prev_time: const_time_counter=const_time_counter+1 elif c_time!=prev_time: sus_time=c_time time_changed=True frame_num=frame_num+1 continue if local_changed: if local==sus_local: local_changed=False if frame_num>10: message_string='Score of Local Team is changed: Time '+c_time+' Local Team Score = '+local+' Visitng Team Score = '+visiting g_time=time.time() print(message_string) logger.info(message_string) elif local!=sus_local: local_changed=True sus_local=local else: if local!=prev_local: sus_local=local local_changed=True if visiting_changed: if visiting==sus_visiting: visiting_changed=False if frame_num>10: message_string='Score of Visiting Team is changed: Time '+c_time+' Local Team Score = '+local+' Visitng Team Score = '+visiting g_time=time.time() print(message_string) logger.info(message_string) elif visiting!=sus_visiting: visinting_changed=True sus_visiting=visiting else: if visiting!=prev_visiting: sus_visiting=visiting visiting_changed=True if const_time_counter>=12 and game_status=='active' and not quarter_time_break: if result_time=='00:0' and seconds: quarter_time_break=True game_period='stopped' message_string='It is Quarter Time Out: Score of Local Team is '+local+' and Score of Visiting Team is '+visiting g_time=time.time() print(message_string) logger.info(message_string) if const_time_counter>=12 and game_status=='active' and game_period=='stopped': if result_time=='08:00' and quarter_time_break: seconds=False quarter_time_break=False game_period='on_going' g_time=time.time() #node.warn('Game is About to start again') elif const_time_counter>=12 and game_status=='active' and game_period=='on_going' and quarter_time_break==False: const_time_counter=0 game_period='stopped' if not time=='08:00': if seconds: message_string='Game is stopped: Time: '+result_time+'s Score of Local Team is '+local+' and Score of Visiting Team is '+visiting g_time=time.time() print(message_string) logger.info(message_string) else: message_string='Game is stopped: Time: '+result_time+' Score of Local Team is '+local+' and Score of Visiting Team is '+visiting g_time=time.time() print(message_string) logger.info(message_string) if g_time-time.time()>10 and quarter_time_break==False: message_string= 'Time: '+result_time+' Score of Local Team is '+local+' and Score of Visiting Team is '+visiting g_time=time.time() logger.info(message_string) prev_msb=t_msb prev_time=c_time prev_local=local prev_visiting=visiting frame_num=frame_num+1 `

Hi Erik, It ran good on jetson nano first time but now even that is giving same error. But the same code works good on my PC, it does not matter how many times i run it. I could not post the .py file here so the above code is not very presentable. Some times it gives this error too. segmentation fault. [URL=https://i.imgur.com/iF2Vd5q.png][IMG]https://i.imgur.com/iF2Vd5qh.png[/IMG][/URL]

OAK-D-IoT-75 with raspberry pi.

erik

Hi msee19018 ,
Thank you for elaborating. The script you provided surely isn't minimal, please see here on how to prepare a MRE so we can take a look at it.
Thanks, Erik

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